Mathematics: If using the method of completing the square to solve the quadratic equation x2 + 7x – 27 = 0, which number would have to be added to complete the square ?

If using the method of completing the square

kissyalexen

20.03.2021

To determine the constant that makes the expression (x² + kx) a perfect square,

Take the coefficient of the second term which is k and ÷2

In this case, it is (7/2)²

At the end it looks like

x² + 7x + (7/2)² = 27 + 49/4

(x + 7/2)² = 157/4

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Claysn9094

18.04.2021

10+10=20

Step-by-step explanation:

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